Bob A L: Is sigma lying about the f1.8 - article says it performs like a f2.8 - one whole stop off?
Re: "it's a good concept to understand because we are not all using the same sized sensor/film nowadays." When did people all use the same sized sensor/film? Not in the film era. In the 1970's, I could buy film from 8x11mm to 8x10 inches (at least), not to mention various Polaroid sizes.
In photography, an aperture (f-stop) gives the same exposure across all formats.
Valentinian: This f1.8 zoom is heavy and expensive. With modern sensors allowing higher and higher ISO, the only reason left to make zooms f 1.4 and 1.8 is to bring out the subject from the background..... for some photographers that might be a good enough reason to spend more money and carry more weight... for others (including me) f 2.8 would be good enough....
As Battersea observed, “This forum is so toxic”. If anyone wonders why, just review photomedium’s posts above:
- using a story about one company’s lens to call another company’s upcoming sensor “crappy” before it’s even on the market;- calling a company a “train wreck” for no apparent reason and totally unrelated to this story;- claiming to have “no agenda” with such comments, an undisguised lie;- attempting to justify outright bashing as “mildly poking fun”;- describing people who call out his shameful behavior as twitching “fanboys” — even while complaining about “name calling”.
It’s a sadly perfect display of why forum rules exist, including rule 6 about “bashing” and “trolling” and rule 8 about staying “on topic”.
It may totally make sense if you're a physicist or engineer. If you're photographer, it's a number you will never need and a calculation you will never make. When photographers measure light, they use aperture (or T-stops in cinema) or EV, but never "total light gathering". Surface area does not come into it. It just creates confusion like you see at the top, where Bob A L asks whether Sigma is lying about f/1.8. (They are not lying.)
@fmian, Exactly right. On your light meter, this f/1.8 lens is an f/1.8 lens and always will be an f/1.8 lens.
"Total light gathering capability" is not even a photographic concept and just serves to confuse readers. The relevant number for light gathering is f/1.8. Period. A light meter doesn't care about sensor size.
How funny that someone thought a thread about a rumored Sigma lens was the place to call the Canon 80D (not D80) sensor "crappy", even though it hasn't even come out yet. Talk about having an agenda.
Introverted Pirate: Certainly a good image but there are no doubts in my minds that there are political considerations behind the attribution. Medias want people to assimilate todays migrants in Europe with world war refugees, and this picture is just right.
@dccdp Thanks for the link, but it does not support the claim about expecting women to apologize for being raped. That is just made up in someone's imagination, and now it's got 9 likes. Weird. The NYT story has one unfortunate remark about "arms length". If that's the "evidence", it's no evidence at all. The story even says "the authorities have offered no concrete evidence that the attackers were among the hundreds of thousands of people who have poured into the country since mid-August".
justmeMN: Another award winning photographer who used a Canon camera. :-)
If the photographer used a Sony, it would likely be big news on all of the photo sites. It would be hailed as a big moment for mirrorless in photojournalism — a validation or turning point, or even a sign of the end of the DSLR. Some people would be saying how critical that camera was for that photo (small, unobtrusive, silent, DR-lift, etc). Because he used a Canon, it's regarded as irrelevant, same as it would be if he used a Nikon.
Neez: He should have brought an A7S
You can turn the LCD off, but the EVF lights up when you use it. There are 2 problems with that in this situation.
Amazing how you got 3 "likes" for something you totally made up, like the other person's 99% number. Anyway, you can read the winning photo how you wish.
altafbusal: $1200 Body onlyNo 4K
Rest in peace Canon.
I don't know how many switched. I keep seeing pro videographers using Canon. Occasionally they use something else, or Canon plus something else.
No worries about the "Medias" uniformly having people think a certain way. That won't happen. Some people have a total lack of empathy, and no amount of media or photography can educate them otherwise. Witness the tragic story of the ship St. Louis in 1939.
Boissez: Amazing shot. I don't really understand why DPreview calls them migrants when the photographer himself described them as refugees.
An interesting detail about this picture is that it is moonlit so as to avoid the Hungarian forces.
Hmmm ... 99% ... so that baby is a male "migrant" in all likelihood, just looking for faster internet and probably going back when he realizes it's not faster than home. And males can't be refugees because ... um ... they're males. Ya think?
The photographer said, "you can’t use a flash while the police are trying to find these people, because I would just give them away". The A7S is a light emitter (LCD or EVF). And looking through the EVF the photographer would have been temporarily blinded in such darkness. Wrong tool for the job.
Photography is about the content. But as photographers we study how to do photography, and that includes studying technical details and what the tools can do. That's part of learning the craft.
agentlossing: That's a beautiful image, but as I recall the World Press award is pretty strict as to any kind of image editing. Doesn't this look like there has been vignetting applied?
Data on the World Press web site shows it was shot using 24mm at f/1.4 for 1/5th second, ISO 6400, 5D2. That lens has a lot of vignetting at f/1.4, exactly as you see in the photo.
DVT80111: Don't hear much bragging about the sensor. I have my suspicion. Don't disappoint me Canon.
Canon's Japanese web site does mention (Google translation): "a new miniaturization process in CMOS semiconductor process. High sensitivity and low noise and wide dynamic range, ..." It will be interesting to see what that means.
scott_mcleod: So, no AFMA? It's a real shame if that feature is still missing (the 50D was the last XXD body to have it, right?)
On Canon's Japanese web site, Google translates this on the 80D Specs page in the Autofocus section: "Correspondence by the AF micro adjustment (all lens uniform adjustment, adjusted for each lens)". So it sounds as if it does have AFMA.
The 70D was $1200 at launch, and somehow Canon is still around.
Richard Gough: Does it have GPS or not?
The DPReview blurb says yes (twice) but no mention in the Canon press release and it shows GPS:None in the DPReview specifications
Looks like it does not have GPS.
zlatko: Sixteen upgrades over the 70D:Resolution increase to 24mp.AF points more than doubled, all cross-type.AF at F8 with 27 AF points.Low light AF down to -3EV.Raw buffer increased from ~11 to 25.100% viewfinder.Dual pixel continuous AF in Live View at 5fps.Anti-flicker feature.Time-lapse.New vibration control mirror/shutter.Headphone socket.1080/60p video.7560-pixel RGB+IR metering sensor.Digic 6.GPS.NFC.
Oops, apparently not GPS. Sorry.